Dynamo-electric-machine rotor



Oct. 30, 1928. 1,689,499

H. G. REIST ammo ELECTRIC MACHINE ROTOR Filed Feb. 17, 1927 E gs:

, be used engaging the shaft on wh'ichthei sec- Patented Oct. 30,1928, v

.commmy, AcoaPoRA'rioN on NEW YORKL;

shaman unaware I n'zimmontncmiomaomtm' Romo'a;

An mation tied rebn'm fn, 1927,. Serial no. 169,0461

[My invention relates to dynamo-electric machincs andmore particularly tothe construction of rotors tliercfor The invention will. be more stood by reference to the following-description- 'ta ken in "connection with the'facc'oim' panying drawing, in which Fig.1 is a -fragmentary sectionalviewo'f adyifa-Iiio-electri'c. machine embodying my lm-proved rotor;

Fig. 2 is a side 'elevationof the rotor'with parts removed and; partly brok'enuawayto show IHOr clearly its construction.' 1

Referring to the drawing, a stator lvof'a' dynamo-electric machine, "provided wit-hf windings) disposed in slots; A'rotor 3 is carried by asuitable shaft twhi'ch is iI'1Ount--' ed in bearings and arranged so'thatthe pole pieces will be rotated closely adjacent the stator 1 I For convenience in constructing the rotorit is preferred to *a-rrange'the laminations to form-a plurality of sections,"as 7 and 8 shown in the drawing. "Although I have, illustrated two's ections'I may employ seyeral'or if desired the rotor maybe) made of a single section. In this instance I have shown these sections mounted directly on the shaft 1 but it isobvious that a hub may tions may be mounted. Eachfot thesections are made up of l'aminations 6 that are spaced longiti'idinally on the shafts by tli'e'r'ings 9 and are spaced adjacent their periphery by a series of circum'lferentially' spa'cedl plates 10 interposedtherehetween. as shown in Fig. 2. By spaeingcertainiof the lammatro'ns by the rings adjacent the shaft and the plates.

adjacent the periphery of the laminations a substantial economy of the material required to construct the rotor is effected, and such an arrangement has the added advantage of permitting a circulation of air through openings 6 and outwardly between the plates at 11 Pairs of laminationsG are spaced in this manner, but any other-convenient grouping, may be'resorted to which will give the rotor the necessary strength and rigidity. The peripheries of the laminations 6 are formed with a series of sides 12 that are slotted at 13. The plates lO'are also provided with slots 14 aligned with'the slots 13 to form fully u'n dergrooves 'lo exten'dingaxially of the rotor,

and'the plates 10 have edges aligned "with:

the sides forming the peripheries of said lam-inations'in order to 't'orma continuous surface extending axially 0t therotor; v. Adjacent theinsi'deot each section a group p of three la-nrinations,as shown at 16, is used to increase the rigidity of the structureand" bolts 17 clamp eaclrsection together. ;An annular plate 19 is secured to the end of each section and is provided with a-plurality, of

openings20 therein. The lgrooves 15 of the sections-are aligned to form a continuous grooveextendin'g axially of the rotor adapt-- edto receive shouldered extensions 22. of pole pieces 5 which extend longitudinallyot both sections, said pole'pieces engagingthe bearing surfaces formed by the sides around the-peripheryof the laminations and the spacing plates th erebctwcenl In order to secure the'pole pieces to the rotortapered, keys 23 and 24 ared-riven in grooves '15 hearing againstshoulders 25of said grooves and shoulders 26 of the polepr'ojections thereby firmly clamping saidpole pieces on said sections and forming a unitary struc-- t-ure} 'Ihe-pol'epiecesb are provided with coils 5? which may be retained in placeby means of coi-l brackets secured: inv opening s 27-between plates 10 and adjacent the pe: riphery of the laminations.

It will be seen from the foregoing descriptionthat Ihave produced a i'otorconstructionirequiri-ng substantiallyv less material than rotors as heretofore 1 constructed, and at the sametime obtained the :necessary rigidity of construction" required for mounting the pole pieces securely on the rotor, and that my arrangementof parts has the added ad vantage of facilitating -.the circulationot air fo rcooling purposes. i

I desire it to be understood that my iii vention is not to be limited to the particular rotor construction shown and described as it is obvious that the grouping of the spaced laminations may be varied or the circumferentially spaced plates maybe extended to engage a plurality of pole projections, and I intend in the appended claims to cover all modifications which do not depart from the spirit and scope of my invention.

\Vhat I claim as new and desire to secure by Letters Patent of the United States, is:

1. In a dynamo-electric machine, a rotor including a shaft, laminations carried by PAT ,QFFJICE;

HENRY e, Enter, or soHENncfrADY, NEW YORK-Assumes To fit):

said shaft, means adjacent. thereto for spac.-, ing laminations longitudinally thereof; said laininations being slotted adjacent their periphery, means interposed lmtvveen said laminations adjacent their periphery having slots conforming withthe slots in said laminations to form continuous grooves axially of said rotor, means'for clamping said lan'iinations together, and pole pieces extending into said grooves.

2. In a dynamo-electric machine, a rotor including a shaft, laminations carried by said shaft, means adjacent the shaft for.spacing laminations longitudinally thereof; said laniinatio-ns having a series of sides forming their peripheries aligned to form a series of surfaces extending axially of said'rotor, plates circumferentially arranged having their edges aligned With the sides of said lamin'ations and disposedtherebetween to forma continuous bearing surface, said plates and said laminations being slotted longitudinally of the rotor, and pole pieces extending into said slots and engaging said bearing surfaces; i

3. Ina dynamo-electric machine, a rotor including a shaft,- laminations carried vby the shaft. (2ircun'iferentially extending-plates interposed between said laminations for spacing them axially of the shaft, means for clamping said lainii-rations and-said plates together. pole pieces engaging said laniinations, and meansfor securing said pole pieces to rid lan1inations.-

at. In a dynamo-electric machine, a. rotor inelnding'a: shat-t,lamination's carried by the shaft,- circumt'erentially extending plates interposied between. said laniinations for spacing them axially of the shaft, said plates having their edges in alignment with the edges of said laininations to form a bearing surface extending longitudinally oi said rotor, means-for clamping said laminations and said plates together, a pole'piece en:- gaging said bearing surface, and means for securing said'pole pieces to saidrotor.

- '5. In a dynamo-electric machine,ya :rotor including a shaft, laminations carriedby the shaft having openings aligned to form air passages, circumferentially spaced plates for spacing said laminations. longitudinally otthe shaft, said laminations and said plates halving longitudinally i a-ligned slots, means for clamping said laminations and said plates together, and pole pieces extending iii jo said slots.

61-111 a'-dynaim-eleetric machine, a rotor including ashai't, laininations carried by the shalt havingopenings aligned to form air passages, said laminations being formed with a series of sides, circuini ereiitially spaced plates between said laminations tor sparing them longitudinally .of said shaft having their edges aligned ivith the sides ot'said laminations, sai ,l laminations and said plates having slots aligned to forni grooves extend ing longitudinally of the rotor, means for elan'iping saidlaniinations and said plates together, and pole pieces, extending into said grooves. v

7. In a, dynamo-electric machine, a rotor 'includinga shaft, a plurality of sections carried by said shaft each including laminations spaced-,longitudEmail thereof, rings surrounding the sha t and interposed lie-- t-WQQILSZLld laminations,.aseries ot' cireuinferentially spaced plates adjacent the periphery of; said laminations and disposed therebet ween,said.plates and said laminations having aligned slots forming grooves longit-udianlly'ot therotor. means for rla nip-- ing said. lan'iinat-ioi'rs, said rings, and said plates together, and pole pieces engaging grooves in each section. I

8. In a dynamo-electric machine, a rotor .includingn shaft, a plurality of sections carried by said shaft each including laminations spaced. longitudinally thei 'eot and having openings in. alignmenti'orniing air passages, rings surrounding the shaft and interposed between laininations. a St?llt:- o" circuini'erentially spaced plates adjacent the peripheryot said laminatitms and disposed therebetween, said. plates and said laminalions having aligned slots. forming grooves longitinlinally ,ot the rotor, means in! clanipingsaid ,laniinations, aid rings. and

said plates together, and pole piercs engaging grooves in each section.

In witness whereof, I have hereunto set my hand this 16th day ot li ehruary. 1592?,

v HENRY'U. itlfilr 'i til) bit

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